diff --git a/lib/mv_web/components/core_components.ex b/lib/mv_web/components/core_components.ex
index 13c69a8..2ed22fd 100644
--- a/lib/mv_web/components/core_components.ex
+++ b/lib/mv_web/components/core_components.ex
@@ -1160,17 +1160,21 @@ defmodule MvWeb.CoreComponents do
   end
 
   # Combines column class with optional sticky header classes (desktop only; theme-friendly bg).
+  # hover:z-20/focus-within:z-20 lift the active header cell above sibling sticky cells (shared z-10)
+  # so its hover tooltip bubble is not clipped by an adjacent opaque bg-base-100 header background.
   defp table_th_class(col, sticky_header) do
     base = Map.get(col, :class)
-    sticky = if sticky_header, do: "lg:sticky lg:top-0 bg-base-100 z-10", else: nil
+    sticky = if sticky_header, do: sticky_th_classes(), else: nil
     [base, sticky] |> Enum.filter(& &1) |> Enum.join(" ")
   end
 
-  defp table_th_sticky_class(true),
-    do: "lg:sticky lg:top-0 bg-base-100 z-10"
+  defp table_th_sticky_class(true), do: sticky_th_classes()
 
   defp table_th_sticky_class(_), do: nil
 
+  defp sticky_th_classes,
+    do: "lg:sticky lg:top-0 bg-base-100 z-10 hover:z-20 focus-within:z-20"
+
   @doc """
   Renders a reorderable table (sortable list) with drag handle and keyboard support.